Furnace



J. E. DIXON Feb. 17. 1925.

FURNACE Filed Nov. 1922 A-rrYs Patented Feb. 17, 1925 v UNITED STATES- 141m JAMES nrnrxomo-r WINNIIEG, MANITOBA, CANADA.

FURNACE.

Application filed November 11, 1922. Serial No. 600,437.

T all whom it may concern Be it known that 1, JAMES. E. DIXON, of the city of WVinnipeg, in the Province of Manitoba, Canada, have invented certain new and useful Improvements in Furnaces, of which the following is the specification.

The invention relates to improvements in furnaces and an object of the invention is to provide a furnace with a comparatively large combustion chamber and with a comparatively long smoke chamber within the furnace casing, which smoke chamber leads the products of combustion in a circuitous path, thereby making it possible to utilize the heat units of the products of combustion for heating the cold air admitted to the air heating chamber of the furnace and subsequently passed out the hot air pipes.

A further object is to construct the air heating chamber so that the air will be circulated in close proximity to the smoke chamber, thereby taking full advantage of the heat radiated from the smoke chamber.

Vith the above more important objects in view the invention consists essentially in the arrangement and construction of parts hereinafter more particularly described and later pointed out in the appended claim, reference icing had to the accompanying drawing in which:

Fig. 1 is a front view of the furnace.

Fig. 2 is a side view thereof.

Fig. 8 is a vertical sectional view centrally through the furnace.

Fig. 4C is a vertical sectional view at 4-4 Fig. 3.

Fig. 5 is a horizontal sectional view at 55 Fig. 3.

In the drawing like characters of reference indicate corresponding parts in the several figures.

The fire pot 1 of the furnace is circular and it is provided with the customary grate 2, the fire pot being located immediately above the ash chamber 3.

Above the fire pet I locate a combustion chamber 4 havin curved sides. The top of the combustion chamber communicates with a circuitous or zig-zagging smoke chamber 5 and the upper end of the smoke chamber terminates in a collecting chamber 6 which leads to the flue or outlet pipe 7 The smoke chamber is provided with suit ably positioned clean out doors 8 and from the above construction it will be obvious that the products of combustion, arising from the combustion chamber, will pass upwardly through the smoke chamber in a circuitous path and will finally pass out through the smoke pipe.

The parts above described are enclosed within a sheet metal casing 9 similar to that employed on present furnaces, the casing being provided with an ash door 10, fire door 11, cold air inlet pipes 12, and hot air outlet pipes 13. This casing is substantially rectangular, as best shown in Fig. 5 and within the casing I locate baffle plates 14 which are carried by the casing and are spaced from the smoke chamber and combustion chamber and are shaped to follow the contour of the combustion chamber and smoke chamber. These baflie plates keep the cold air admitted to the bottom of the furnace through the pipes 12, in close proximity to the smoke chamber and the said cold air is efiiciently and effectively heated prior to passing out through the distributing pipes 18.

Obviously, the combustion chamber and the smoke chamber give a comparatively large heat radiating surface within the furnace which is effectively utilized to heat the cold air admitted to the bottom of the furnace.

The casing is provided with clean out doors 15 opposing those 8.

What I claim as my invention is:

A furnace comprising a fire box, an outer casing provided with a smoke outlet, a pair of plates secured to opposite sides of the casing to extend upwardly therealong from a point above the fire box, one of said plates being formed with reverse bends aifording spaced battles and sloping curvilinear sur faces at the sides of each bafiie, the other plate being similarly formed with a single reverse bend affording an inwardly projecting bafile staggered with respect to the baffles of the other plate, a combustion chamber closing the top of the fire box and a fiat tubular conduit extending from the top of the combustion chamber to the smoke outlet and disposed to pass between the inwardly directed baffles in spaced relation thereto, said conduit being shaped to follow the contour of the passage afi'orded between the aforementioned plates and serving to act as a further check t the direct ascent of air supplied to the lower portion of the casing, said Signed at Winnipeg, this 11th day of 00- air being directed by the bafiles into contact tober, 1922. With opposite sides of the smoke conduit so 4 4 as to be heated by the letter, said conduit JAMES DIXON' 5 being provided at the bends thereof with In the presence of clean-out openings opposing corresponding GERALD S. ROXBURGH, openings formed in the outer casing. M. B. KELLEHIJR. 

